Chapter 209: Breaking The Game
"Muramasa's purpose is most likely to rescue Kuchiki Koga, but only the head-captain and Captain Ginrei know about Kuchiki Koga's whereabouts. To get his location, that's the reason why Muramasa's target was the head-captain."
Leaving the Kuchiki family's mansion, Sui Feng and Byakuya followed Mazuru, while he spoke slowly.
"So, that huge fire and loud explosion that happened in the First Division earlier, it was Muramasa who attacked the head-captain?" Sui Feng asked Mazuru.
Mazuru nodded, "That should indeed be the case."
He explained further, "The head-captain was one of the parties who sealed Kuchiki Koga back then, and he knew how difficult of an opponent Muramasa was. Even with his ability, he couldn't resist and Ryūjin Jakka has materialized into reality by Muramasa. Although it is also the strongest of a certain department, the power of Ryūjin Jakka is not like to that of Hyōrinmaru, which has not yet fully developed its power in the hands of Toshiro. The head-captain can once again suppress Ryūjin Jakka and make him submit, but in the process, a battle will inevitably break out and probably because he was worried that the battle will cause huge damage to Seireitei, so he chose to change the battle place and disappeared from there..."
Although these were only Mazuru's guesses based on the events, both Sui Feng and Byakuya believed that what Mazuru said may be the truth.
Mazuru also sighed inwardly.
Is Captain Yamamoto strong? Of course he's strong. As the founder of Gotei 13, the Zanpakuto, Ryūjin Jakka, in his hand is the oldest and strongest Zanpakuto in the fire department. His strength as the strongest shinigami was well deserved. Unfortunately, it was precisely because he was too strong, all the ambitious people, when targeting the Soul Society, first will consider how to deal him.
The Bakkōtō that Shusuke had, could restrain Ryūjin Jakka's flames, Muramasa's ability could make Ryūjin Jakka materialize into reality, and then fight against its own master. Even Aizen, in order to deal with the captain Yamamoto, and specifically, in order to deal with Ryūjin Jakka, created the special arrancar, Flame Extinguishing Prince - Wonderweiss.
Therefore, it was really difficult for the head-captain, who gets targeted in various ways.
Mazuru didn't know that in the Thousand Year Blood War arc, although Yamamoto used Ryūjin Jakka's Bankai, he was still targeted specifically and died miserably in the end.